Hot-air heater.



R. L. SHORT.

HOT AIR HEATER.

APPLIOATION FILED SEPT. 23, 1907.

91 9 ,966, Patented Apr. 27, 1909.

2 SHEETS-SHEET 1.

R. L. SHORT.

HOT AIR HEATER.

APPLIGATION FILED SEPT. 23, 1907.

Patented Apr. 27, 1909.

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UNITED STATES PATENT OFFICE.

ROBERT L. SHORT, OF FOSTORIA, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO TOLEDO GAS FLOOR FURNACE COMPANY, OF TOLEDO, OHIO.

HOT-AIR HEATER.

Specification of Letters Patent.

Patented April 27, 1909.

To all whom it may content:

Be it known that 1, ROBERT L. SHORT, a citizen of the United States, residing at Fostoria, in the county of Seneca and State of Ohio, have invented a certain new and useful Improvement in Hot-Air Heaters, of which the followin is a full, clear, and exact description, re erence being had to the accompaniing drawings.

T e primary obliect of this invention is to provide in a simp e and inexpensive form a very efiicient hot air heater sup lied by gas.

The invention is well adapte for embodiment in a floor heater wherein the heater is depressed below the floor level, its upper surface being supported upon the floor and consisting of an open grate structure similar to that em loyed in an ordinary hot air register.

Anot or object is to'so arrange the parts that the danger of the flame being inadverten'tly extinguished is reduced to a minimum.

Another object is to keep the gas and prodnets of combustion entirely se arate from the hot air passageway so that t e air is not contaminated and even if the flame should be extinguished, no escape of gas into the room would result.

I accomplish the above objects by a floor heater constructed and arranged after the manner illustrated by the articular embodiment shown herein, whic will now be described.

The drawings show my floor heater in an ap roved form.

igure 1 is a vertical section thereof lengthwise of the heater. Fig. 2 is a vertical section crosswise, being at right angles to Fig.1. Fig. 3 is a plan.

Referring by reference numerals to the drawings, 10 and 11 represent the ends and 12 and 13 the sides of a rectangular box or casing which has a bottom 14. This casing is preferably made of sheet metal. It has its upper end'flanged outwardly, such flange being adapted to extend onto the upper side of the floor to which the heater is applied, as illustrated by the boards 1515 of Fig. 1. Resting on the floor is a rate 16 which may have downward lugs to liold it against displacement.

20 represents an inner vertical rectangular casing which is open at its top and bottom; it is preferabl constructed of two thicknesses of meta with. an interposed non-conductor of heat, as asbestos, indicated by 21. The opposite sidesv of this inner casing are rivete tothe sides 12 and 13 of the outer casing. The other two sides or ends of the casing stand some distance from the plates 10 and 11 to leave air passageways between them. Within the inner casing 20 is a metal box composed of sides 23, ends24, a top 25 and a bottom 26. This box is in open communication at its lower end with the air space below the heater. This open communication is rovided by a downward extension of the box and consists of end walls 27 and side walls 28 which lead from an opening in the bottom of the box to a correspondmg opening in the bottom plate 14 of the easing. The side walls 28 are shown as integral portions of the bottom 26 turned downward, the end walls being plates riveted to the ends 24 of the box.

Extending through openings in the top late 25 and bottom plate 26 are a series of lot air pipes 30. These pipes extend a short distance above the plate 25 and below the plate 26. They have open ends above and below. They are arranged in two series on opposite sides of the central longitudinal plane of the heater and are inclined toward such plane as they extend upwardly, as shown in Fig. 2.

The gas burner is designated 32. It occupies the space near the bottom of the heater within the extension of the inner box and between the lower ends of the inclined pipes 30. This burner is supplied with gas and air from the pipe 33, the gas burning at openings 34 arranged in two rows near the top of the burner. These two rows are on 0 posite sides of the central longitudinal p ane of the heater and are so placed that the flames burning from the emitted gas impinge directly on the inclined pipes 30 and encircle them, heating them to an intense heat. This co'urse of the flames is augmented by the baffle 36 in the form of a V- shaped plate secured to the end plates 24.

37 indicates a pipe for the products of combustion which passes from the inner box near its upper end to the chimney, this pipe being shown as passing through the end wall 10 and the wall 20, and the wall 24, being flanged and secured to the latter wall.

In operation, the cold air comes down from the floor of the room at the ends of the burner.

radiator in the space between-the ends 10 and 11 and the walls 20, and turns and passes up into the room within the casing, 20, both outside of the inner box and through theipes 30. These ipes and the walls of the box being intense y heated from the burning gas, the air is correspondingly heated. The products of combustion are kept entirely separate from the air admitted to the room. The burner is so protected that the danger of its flame beingblown out is reduced to a minimum. The downward draft of cold air does not come in contact at all with the burner and there is very little danger 'of any draft in the basement enterin around the burner with sufiicient force to Talow out the flame. Should there be a break in the gas main, causin the flame to be extinguished, and the gas e again supplied without the valve being shut off, which mighthappen, the gas would pass harmlessly up the chimney through the pipe 37 and would not enter the room.

The gas is supplied from the main through a pipe 50. ,A suitable valve 51 connects this with the mixer 52 which has air openings and is connected with the pipe 33 leading to the A pipe 53 connects with the pipe and leads to a pilot burner 54. A suitable cook 55 in the pipe 53 controls the pilot burner. In norma usage the cook 55 is continually open and the pilot burner remains lighted at all times. The valve 51 has its stem 57 connected to an upright rod 58, the

upper end of which is square and passes into a square socket in an arm 60 which occupies a depression 61 in the grate 16. The turning of this arm is therefore adapted to regulate the opening of the valve, and hence the amount of heat. The arm is shown as having its stem extending through the grate and carrying a collar 62 to prevent displacement. The socket of this arm fits loosely over the upper end of the rod 58 so that the grate may be removed whenever desired. A suitable lug 63 on the underside of the arm cooperates with notches 64 carried by the grate to hold the arm against accidental displacement, and a suitable lip 65 on the arm furnishes means for shifting it by ones foot. The arm is preferably extended to form a pointerand a series of numerals are provided, indicating the relative amounts the valve is opened.

With my heater under normal conditions, it is only necessary once a year to go into the basement and light the pilot, then the gas may be turned on to any desired extent by the operation of the arm 60, and immediately the desired amount of hot air is delivered into the room. The heater is economical of gas, due largely to the fact that the flames are brought into such intimate relation with the hot air conduits. The heat may be regulated as desired, or instantly shut off altogether.

I claim: 1. In a gas heater, the combination of a longitudinal gas burner, a heating drum, two rows of hot air pipes on opposite sides of the burner inclining toward each other upwardly and extending though the top and bottom of the drum, and a V-shapcd bafiie located above the burner and above the ends of the pipes and adapted to assist in direetin the ames and hot gases around the inc l ined pipes.

2. In a hot air heater, the combination of a box having a downward extension, a series of open-ended inwardly inclined hot air pipes extending through the to and bottom of the box, a gas burner locate in a downward extension of said box in communication with the space around said pipes, and a casing having a grating at the top and having an olpeningin the bottom surrounding the box, t e casing supporting the said box and adapted to conduct cold air to the lower ends of said pi es.

3. In a ot air gas heater, the combination of an outer casing having a grate at its upper end, and an operung at its lower end, an inner casing leaving a cold air space between it and the outer casing, a box within the inner cas ing, downward walls from the bottom of said box to the bottom of the outer casing adjacent to the opening therein and forming an air passageway from beneath the casing to the interior of the box, a gas burner located in said passageway, and open-ended hot air pipes extending through the top and bottom of the box and arran ed in two rows on opposite sides of the gas urner.

4. The combination of an outer casing, an inner casing providing a cold air passagewaybetween the walls of the two casings, a box within the inner casing and providing a hot air passageway between it and the walls of the inner casing, open-ended hot air pipes extending through the top and bottom. of said box, and a gas burner arranged to heat said hot air pipes and box.

5. The combination of an outer casing, an inner casing providing a cold air passageway between the walls of the two casings, a box within the inner casing having an extension and providing a hot air passageway between it and the walls of the inner casing, openonded hot air pipes extending through the top and bottom of said box, and a gas burner in an extension of the box which is in open communication with the air outside the outer casing, said hot air pipes being arranged in two rows and the gas burner extending longitudinally between the rows.

6. In a gas heater, an outer casing closed at the bottom, there being an opening therein and a grating at its top, an inner box closed at the top and bottom, the bottom portion having an opening and flanges depending from said bottom, said flanges registering with the opening in the bottom. of the outer casing, pipes extending through the top of the inner oaslng and through the bottom thereof outside the pentral opening, and a V- shaped bafliebetween the pipes and above the bottom of the inner box.

In testimony whereof, I hereunto aflix my signature in the presence of two wltnesses. 

